Evidence of a millimeter size virtual light source for acousto-optical tomography  in scattering media using a chirp modulation of the ultrasound

Michael Atlan; Francois Ramaz; Benoit Claude Forget; Albert-Claude Boccara

doi:10.1117/12.499958

14 October 2003 Evidence of a millimeter size virtual light source for acousto-optical tomography in scattering media using a chirp modulation of the ultrasound

Michael Atlan, Francois Ramaz, Benoit Claude Forget, Albert-Claude Boccara

Author Affiliations +

Proceedings Volume 5143, Novel Optical Instrumentation for Biomedical Applications; (2003) https://doi.org/10.1117/12.499958
Event: European Conferences on Biomedical Optics 2003, 2003, Munich, Germany

Abstract

The Acousto-optical imaging technique in scattering media can be explained by using the concept of a virtual light source moving inside the medium. Its emission depends on the local optical properties of the insonified area, making it an interesting candidate for in-depth tissue (several centimeters)probing. Evidence of this statement in the restrictive case of a chirp-reduced-size virtual source is shown using a technique that records a film during one chirp modulation of the imaging system. A Fast Fourier Transform treatment correlates the Fourier spectrum of time-sampled transmitted light to the position of the source along the ultrasonic beam, revealing its millimetric size.

Citation Download Citation

Michael Atlan, Francois Ramaz, Benoit Claude Forget, and Albert-Claude Boccara "Evidence of a millimeter size virtual light source for acousto-optical tomography in scattering media using a chirp modulation of the ultrasound", Proc. SPIE 5143, Novel Optical Instrumentation for Biomedical Applications, (14 October 2003); https://doi.org/10.1117/12.499958

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